<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <table border="1">
        <tr>
            <th>1</th>
            <th>1</th>
            <th>1</th>
            <th>1</th>
        </tr>
        <tr>
            <td>2</td>
            <td>2</td>
            <td>2</td>
            <td>2</td>
        </tr>
    </table>
    <form action="#">
        <label for="names">用户名</label>
        <input id="names" type="text" placeholder="请输入用户名">
        <input type="password">
        <input type="checkbox" name="l">
        <input type="checkbox" name="l">
        <input type="radio" name="i">
        <input type="radio" name="i">
        <input type="submit" value="提交">
    </form>
</body>
</html>